PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It is very difficult to mix silicon, titanium, magnesium and other materials in to alloys and turn them into molten metals.
http://www.w3.org/ns/prov#wasQuotedFrom
  • phys.org